Table 1.

Rate parameters for scheme 1

	Control		Ceramide
Rate Constants	A	z	A
Forward
k1	2	0.6
k2	10
k3	14	1.5	56
k4	90	0.6
Backward
k−1	50	−0.6
k−2	10
k−3	0.1	−1.5	0.3
k−4	20	−0.6

A (s⁻¹) is the rate constant at 0 mV, and z is the charge moved.